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Our Sense Organs

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Camila Lefno

on 13 June 2013

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Transcript of Our Sense Organs

Sense organs: eyes, ears, skin, tongue and nose
Parts of the ear
Our sense organs
We have 5 sense organs
We see with our eyes.
Parts of the skin
Outer ear
We smell with our nose.
We feel with our skin.
We hear with our ears.
We taste with our tongue.
Cornea: It is like a clear window. It covers the front of the eye.
Iris: It is like a shade on a window. It lets just the right amount of light enter the eye.
Pupil: It is the circular hole in the centre of the iris. Light enters the eye through the pupil.
Lens: Focuses the image we see onto a screen at the back of the eye.
Retina: It is the screen at the back of the eye. It sends messages to our brain to tell us about the image we see.
Middle ear
Inner ear
Pinna: Collects sounds.
Ear canal: Send sounds into the middle ear.
Eardrum: When sounds reach the eardrum, it shakes or vibrates. This helps sounds reach the inner ear.
Cochlea: When sounds reach the cochlea, it sends messages to our brain to tell us about the sounds we hear.
Outer ear: Is made up of the pinna and ear canal.
Middle ear: Is made up of the eardrum.
Inner ear: Is made up of the cochlea.
Outer layer
It is the layer of skin that we can't see. It prevents dirt from getting into our body.
It has structures that collect information about things we touch. When we touch something, the structures send messages to our brain to tell us how that thing feels.
Our tongue
Bumps that contain taste buds
When we eat food, the taste buds send messages to our brain to tell us how the food tastes.
Our nose
It is a big space in our nose, the top of the nasal chamber contains structures that pick out scent participles. These structures send messages to our brain to tell us what we are smelling.
Scents are carried by tiny participles which float in the air. When we sniff, these scent particles enter our nose through our nostrils.
Seeing helps us to collect information from books and lets us enjoy television programmes.
Hearing helps us to pick up sounds made by people and objects around us. We can tell if sounds are loud or soft, pleasant or unpleasant.
We can feel with every part of our skin. Our lips and fingertips are more sensitive than other parts of our body. We can feel if something is smooth or rough, hot or cold, hard or soft, dry or wet.
Tasting lets us know when the food we eat is sweet, sour, bitter or salty.
Smelling helps us to tell if something smells fragrant or has an unpleasant scent. Smelling also warns us from danger.
Our nose and tongue work together:
When we eat food, our nose smells the food and our tongue tastes it.
When we have a blocked nose,
we cannot smell very well. Our food also seems to lose some of its taste.
Our sense organs work together:
We use all our senses to help us find out about the world around us every day. Our different sense organs work together when we play, eat and carry out other activities.
Sense organs
Which we use to
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